בדרך למספרה חשבתי שאני לא צריכה להסתפר, אבל בסוף החלטתי שכן.

Because Hebrew often drops subject pronouns when the verb already makes the subject clear.

חשבתי already means I thought, and החלטתי already means I decided. Adding אני is possible, but it usually adds emphasis or contrast.

So:

• חשבתי = I thought
• אני חשבתי = I thought / I was the one who thought

The prefix ש־ means that in this sentence.

So:

• שאני = that I
• שכן = that yes

It introduces a subordinate clause after verbs like thought, said, knew, decided, and so on.

Because צריכה is the feminine singular form, so it shows that the speaker is female.

The word צריך / צריכה agrees with the person who needs something:

• אני צריך = I need / I am supposed to... (male speaker)
• אני צריכה = I need / I am supposed to... (female speaker)

Notice that חשבתי and החלטתי do not show gender here, but צריכה does.

This is very normal in Hebrew.

צריך / צריכה is often used like a modal word meaning need to or be supposed to, and Hebrew does not always shift the tense the same way English does in reported thought.

So חשבתי שאני לא צריכה להסתפר literally has a present-looking צריכה, but it naturally means:

• I thought I didn’t need to get a haircut

Hebrew is keeping the thought as it was at that time, rather than forcing a tense shift the way English often does.

Because צריך / צריכה normally works with an infinitive to express necessity.

The pattern is:

• צריך / צריכה + infinitive

So:

• אני צריכה להסתפר = I need to get a haircut
• הוא צריך ללכת = he needs to go
• אנחנו צריכים ללמוד = we need to study

This is one of the most common Hebrew structures for need to.

להסתפר means to get a haircut or to have one’s hair cut.

It is from the התפעל pattern, which often has a reflexive meaning. But here it does not usually mean that the person is literally cutting their own hair. It usually means they are getting their hair cut, typically by someone else.

This is different from לספר, which can mean things like:

• to tell
• to cut hair (for someone else, depending on context)

So:

• להסתפר = to get a haircut
• לספר מישהו = to cut someone’s hair

This is a very common Hebrew preposition pattern.

בדרך ל... means on the way to...

Also, Hebrew prepositions like ב־ and ל־ attach directly to the following word:

• ב = in / on / at
• ל = to

If a noun is definite, the ה of the often gets absorbed into the preposition in writing without vowels.

So forms like these can look the same without vowel marks:

• למספרה = to a hair salon
• למספרה = to the hair salon

The exact pronunciation depends on whether it is definite, but in normal unpointed writing they look identical.

Here בסוף means in the end, eventually, or after all.

It does not have to mean a physical end of something. It is very often used to show the final outcome after hesitation, change of mind, or a process.

So in this sentence, it signals:

• first, she thought one thing
• then, finally, she decided the opposite

Because Hebrew very naturally uses כן to stand for the positive version of something that was just denied.

Earlier the sentence says:

• אני לא צריכה להסתפר = I don’t need to get a haircut

Then:

• החלטתי שכן = I decided that yes / that actually I do

The full version would be something like:

• החלטתי שאני כן צריכה להסתפר

But Hebrew often leaves the repeated part out because it is already understood. This kind of ellipsis is very natural.

No. Here שכן is simply:

• ש־ = that
• כן = yes

So it means that yes.

This is different from the more formal conjunction שכן meaning since / because / for. That is a different use.

In this sentence, שכן is not a conjunction meaning because. It is just that yes, referring back to the earlier idea.

Only the gender-marked part would change:

• בדרך למספרה חשבתי שאני לא צריך להסתפר, אבל בסוף החלטתי שכן.

The only difference is:

• צריכה → צריך

The past verbs חשבתי and החלטתי stay the same in first person singular.